Cummins ISX oil EPA 2013, have I caused a major problem?

Discussion in 'Ask An Owner Operator' started by TiredIron, Feb 3, 2018.

  1. TiredIron

    TiredIron Bobtail Member

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    Feb 3, 2018
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    Might be in the wrong forum but here goes anyway

    New owner operator here, and a very fretful one at that. I'll try and be as brief as possible.

    I've been running a new 2016 Peterbilt 567 with a Cummins ISX 15 550/2050 for exactly a year now during which I've put on 182,000 km. For about the first 80,000 of these I've used the manufacturer recommended 10w30 oil, but for the latter 100,000 I accidentally switched to 15w40.

    To explain: I started taking it in for oil changes at Cullen Diesel Power who are my neck of the woods' Detroit specialists but are perfectly capable of doing an oil change and grease job on a Peterbilt or Kenworth. They have a hell of a deal on for that service right now, have for awhile and are a short walk from my house so it makes a lot of sense for me to use them. HOWEVER, since I started using them, they assumed I wanted 15w40 and honestly I kept meaning to ask or look for a detailed breakdown of the materials used but it kept escaping my mind for quite the period of time. As a single man new to both owning a truck and a home, I can be a little frazzled and overwhelmed sometimes.

    Just yesterday I had two engine lights come on, these were SPN 5397 and SPN 81 pertaining to "too frequent active regens" and "exhaust trap door blockage" respectively. Now, I shouldn't need a DPF cleaning yet and I'm at 2800 hours only so far but I spoke to Peterbilt today and said "Hey, I know 10w30 is the go-to for these engines but is 15w40 gonna cause me grief?" "Oh, you'll want to change that out next time for sure," they said, "better performance to be had from the 10w30 and its better on the after treatment system..."

    Better on the after treatment system, eh? Interesting / terrifying coincidence right there.

    I pull a fully loaded b-train all week, so 140,000 lbs and my dispatch team is gracious enough to keep me loaded for 90% of the week or more. I grease the whole truck every other weekend but do the driveline every weekend since my routes have 13% pulls. Oil changes in the summer were every 28,000km, Cummins' earliest recommended service interval for a severe duty truck, but now that it's winter I do them every 20,000 since my miles are down but idle time is up and I want to keep it from getting too dirty. Some may say it's aggressive but my approach this far has been maximize up-time even if it means spending just a little bit more servicing early for insurance. To get my DPF issues resolved I will be missing my first day of work in a year on Monday and 182,000 km seems early for this.

    Has my oil blunder affected the life of my truck?
     
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  3. Brandt

    Brandt Road Train Member

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    I think the thinner oils are for fuel MPG. I would make sure your using the new spec oils for the newer emission engine. They help keep the soot from building up in the engines. They can handle the soot better then the older standard 15w-40. Their is a guy on YouTube that talk about how first generation ISX had trouble with soot building up in the ISX plus people not changing the oil enough and it basically would take out the top cams and rollers The soot would biuld up in the oil ports and clog starve the top of the engine of oil.

    At 7 minutes you can see what happens to the ISX from not changing oil enough. And how the soot build up will take the top apart. That what the new spec oil help control

     
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  4. KB3MMX

    KB3MMX Road Train Member

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    ASH buildup in a DPF is almost exclusively metallic in origin, coming from combusting ZDDP .... A old oil additive used to combat wear..... Higher levels of ZDDP are in 15w-40 oils...

    ZDDP is in high levels in 15-40 diesel oils , even CK-4 .....

    10-30 CK-4 oils use newer boron and moly additives that protect better in high heat modern engines.... And don't foul the DPF with metallic oxide ash like the 15w-40s do .....


    Get that 15W-40 out ASAP and back to 5-30, 10-30 etc....

    You might want to get that DPF cleaned out now as a precaution...... With 10-30 oil you shouldn't need to clean again for 300-400k miles.

    .
     
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  5. KB3MMX

    KB3MMX Road Train Member

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    Another reason why 15w-40 oils are a antique .... Soot thickening is a much bigger problem with a oil that starts out thick from the beginning.

    10-30 oils generally don't have the soot thickening problems that starve oil to moving parts like a 15w-40.......but it's hard to break some of the old timers from the "thicker oil is better" mentality.


    .
     
    Last edited: Feb 4, 2018
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  6. pushbroom

    pushbroom Road Train Member

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    15-40 is perfectly fine as long as it is CK4/CJ4
    10-30 is spec ed by the OEM for fuel mileage.
    Attached is oil specs for a 2350 as per cummins.
     

    Attached Files:

  7. Rockin chair

    Rockin chair Bobtail Member

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    Sep 1, 2018
    cumberland county, NJ
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    I'm a new Cummins owner( or servant) haven't figured that one out yet,lol. I read the chart that you provided as careful as I could. But beings I'm only do what I'm told oil and part changer, is the 10w-30 my best bet if the outside temp doesn't get above 105f ? I have a ISX15 450hp in a 2014 T680. I'm still trying to figure out if it the 2350 class or not. Thanks in advance, Don
     
  8. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    I run Mobile 15/40 in my ISX. Change every 20K, and all filters. So far so good.
     
  9. Rockin chair

    Rockin chair Bobtail Member

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    Sep 1, 2018
    cumberland county, NJ
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    Thank you, Dave. My father use 15/40 also. I was also looking at the 15/40 yesterday as my wife and I was shopping at the local Walmart. then I started to read threads lol. I seen a lot of recommends saying to use 10/30 because of soot value of 10/40. i'll just stick with the 15/40
     
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  10. Dave_in_AZ

    Dave_in_AZ Road Train Member

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    I tried the Valvoline blue or water ever it's called once. F that. Used a gallon every 5K miles. And it looked like water.

    My trustee Mobile uses a gallon right at 10K.

    $13 gallon at Freightliner. Sometimes $11.75 on sale at Wally. Chevron just as good imho.
     
  11. stoan

    stoan Bobtail Member

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    Thanks for posting this. It's amazing what can be learned from reading the manual.
    They warn that too thin [0-30] can damage the engine.
    They recommend synthetic only if the temps are consistently below -13*f.
    They not only allow 15-40 but recommend it in hot climates.
    Looks like the perfect isx oil for me based in FL is still good old conventional 15-40.
     
    Last edited: Jan 27, 2019
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